Evaluation of Drought Tolerance Indices and their Relationship whit Grain Yield in Wheat Cultivars

To illustrate the effect of drought stress on grain yield of 8 wheat cultivars and evaluation of drought tolerance and susceptible ones, two trials were established using randomized complete block design with three replications at research field of University of Mohaghegh Ardabili, Iran. In the first trail, drought was aplplied and irrigation was done once in order to seed germination, but in the second trail, regional normal irrigation regime was used. Wheat cultivars were Azar2, Agostave, Phinican, Sardari, Soysonz, Gaspard, Gascogen, and MV17. Results showed that according to the Fernandz grouping, Azer 2 was suitable for both stress and non stress conditions. MV17, Gascogen and Gaspard were recommended for optimum environment. Sardari cultivar was identified suitable for severe stress environment. Finican, Soysonze and Agostave cultivars had few grain yields in both stress and non stress conditions